Gas range



' ilws@ Apr. '3, 1923.

4 F. wT ROBERTSHAW ET AL GAS RANGE Filed Apr.

Patented Apr, 3, 1923.,

:FREDERICK W. ROBERTSHAW, OF PITTSBURGH, AND GEORGE A.

insane TnTanT EOBERTSHAW, or

GREENSBURG, PENNSYLVANIA.

GAS RANGE.

Application led April 7,

To all' 'whom t may concern.'

Be it known that we, FREDERICK 1V. Ro-4 ERTsHAw and GEORGE A. RoBERTsHAw, both citizens of the United States, residing, re-

4spectively, at Pittsburgh, in` the county of Allegheny and State of Pennsylvania, and Greensburg, in the county of lVestmoreland and State of Pennsylvania, have invented a new and useful Improvement in -Gras Ranges', of which the following is a full, clear, and exact description, reference being'had to the accompanying dra-wings, forming part of this specification, in whichl Figure 1 is afside view, partly broken away, of a gas range embodying our invention;

Figure 2 is a rear elevation of the saine; and

Figure 3 is a sectional plan view of the valve.

Our invention has relation to gas ranges and more vparticularly to gas ranges which have a burner or burners for heating the oven and also other burner or burners for hotplates, broilers or the like.

n ranges of this character it is extremely desirable that thermostatic means be provided for automatically cont-rolling the temperature of the oven, but that such control shall not interfere with -the supply of gas to the other burner or burners, leaving t-he latter free to be regulated by means of a hand valve or valves,

Our invention provides means of simple and effective character by means of which the temperature of the oven is thermostatically regulated without interference with the gas supply of the other burner or burners.

Referring t0 the accompanying drawings, in which we have shown,1 the preferred embodiment of our invention, the numeral 2' designates a'gas range of any suitable character having the burner supply pipe 3 for supplying the oven burners, and aA burner supply pipe '4 for supplying the burners of the hot plate 5. connection for the range, this lconnection leading into the chamber of a valve casing 7. This valve casing is provided with a. through passage 8 leading to the burner vsupply pipe 4. 1t is also provided with a port 9 leading from the passage 8 into a ch-amber 10, having an outlet port 11, which 6 designates the supplyl 1921. Serial N0.459,359.

is connected to the burner supply pipe 3. 12 isa valve for opening and closing the port 9, this port having a stein 13 which is arranged to be actuated by any suitable thermostat .14 which extends within the oven. 15 is a spring seated around the tail stem 16 of the valve and arranged to normally tend to close the valve against the action of the thermostat.

The operation will be readily understood. The gas can at all times pass freely to the burner supply pipe 4, while the supply of gas passing to the pipe 3 for the oven burners is under the control of thethermostatically operated valve 12.v

XVe do not desire to limit ourselves to the particular construction and arrangement which we have here shown and described, but it will be obvious 'that various changes can be made in the construction ot the valve casing and valve, in the construction and arrangement of the thermostat and in the various pipe connections, without departing from the spirit and scope of our invention as defined in the appended claims,

What we claim is:

1. A gas range comprising an oven and an independent heater for cooking purposes,- said range having two burner supply pipes each provided with a4 manual 'control therein and adapted to supply said oven and independent heater, respectively, a valve casing having a gas supply connection and a separate outlet connection to each of the burner supply pipes, and a thermostatically controlled valve in said `casing and controlling-the flow of gas to one of said outlets only, substantially as described.A

2. A gas range comprising an oven and an independent hea-ter for cooking purposes, said range having two sets of burner supply pipes each provided with a manual control therein and supplying fuel to said oven and said heater, respectively, a valve casing having a gas supply connection and also having a passage leading therefrom directly to one of the burner` supply pipes, said casingbeing further provided with an outlet leading to the other burner supply pipe, and a thermo'- statically controlled valve controlling said last named outlet, substantially as described.

3. gas range comprising an oven and an independent heater, said range-having a main gas supply pipe, a plurality of burner supply pipes ted therefrom for said oven and independent heater, respectively, a valve casing arranged to receive gas from said gas supply pipe and distribute the saine to said burner supply pipes, and a thermostatically controlled valve in said casing automaticallyI controlling the supply of gas to one of the burner supply pipes and permitting free passage of the gas from said casing at all times to the other burner supply pipe, sub; stantially as described. i I

4. A gas range comprising an oven and an independent heater, said range having two Sets ofburner supply pipes for said oven and independent heater, respectively,

4said connection, said casing being further provided with an outlet leading to one burner supply pipe, and a thermostatically controlled valve controlling said last named outlet, substantially as described.l

ln testimony whereof, We have hereunto set oui' hands.

FREDERICK WV.' ROBERTSHAW. GEORGE A. ROBERTSHAV. 

